Carmen Huertas tearfully apologized as she was sentenced Friday.
She pleaded guilty to manslaughter in August.
The crash last October on the Henry Hudson Parkway killed 11-year-old Leandra Rosado. The children were on their way to a slumber party.
The dead girl's father, Lenny Rosado, told the court he keeps wondering if Leandra cried out for him as the car went airborne.
The tragedy prompted what is known as Leandra's Law. It makes drunken driving a felony if a child is in the car.